diff --git a/main.go b/main.go
index 8b4c77a..0b0fe58 100644
--- a/main.go
+++ b/main.go
@@ -32,21 +32,20 @@ type ball struct {
 // parâmetros
 const windowWidth = 700
 const windowHeight = 700
-const gridDivision = 8
+const gridDivision = 4
 const verticalGrids = windowHeight/gridDivision
 const horizontalGrids = windowWidth/gridDivision
 const magnetsDistance float32 = 80
 const magnetRadius = 10 
-const gravConst float32 = 200
+const gravConst float32 = 50
 const magnetsAngle = 0
 const luminance = false
-const hideBalls = false
+const hideBalls = true
 const hideMagnets = false
 var startingBallSpeed = rl.Vector2{X: 0, Y: 0} // joga a bola em alguma diração 
 // antes que ela comece a ser atraida pelos ímãs
 var cameraOffset = rl.Vector2{X: 0, Y: 0}
 
-
 func (ball *ball) update(magnets []magnet) (bool, rl.Color) {
     magnetsPull := rl.Vector2{}
 
@@ -55,26 +54,31 @@ func (ball *ball) update(magnets []magnet) (bool, rl.Color) {
             rl.Vector2Subtract(ball.pos, magnet.pos),
         )
         distance := rl.Vector2Distance(magnet.pos, ball.pos)
-        distanceSquared := float32(math.Pow(float64(distance), 2))
-        force := gravConst / distanceSquared
+        distanceSquared := math.Pow(float64(distance), 2)
+        force := gravConst / float32(distanceSquared)
 
         acceleration := rl.Vector2Scale(direction, -force)
 
         magnetsPull = rl.Vector2Add(magnetsPull, acceleration)
     }
 
-    // fmt.Println(magnetsPull)
     ball.speed = rl.Vector2Add(ball.speed, magnetsPull)
     ball.pos = rl.Vector2Add(ball.speed, ball.pos)
+
+    // verificar se bola parou em cima de um ímã
     for _, magnet := range magnets {
+
         distance := rl.Vector2Distance(ball.pos, magnet.pos)
-        if distance < magnet.radius + ball.radius {
+
+        insideMagnet := distance < magnet.radius /* + ball.radius */
+        // atRest := math.Abs(float64(rl.Vector2Length(ball.speed))) < 0.01
+
+        if insideMagnet /* && atRest */ {
             if luminance { magnet.color.A = uint8(ball.steps) }
             return true, magnet.color
         }
     }
     return false, rl.NewColor(0, 0, 0, 0)
-
 }
 
 // var colors = []rl.Color{
@@ -97,12 +101,12 @@ func main() {
             // force: magnetForce,
         },
         {
-            color: rl.Green,
+            color: rl.Gray,
             radius: magnetRadius,
             // force: magnetForce,
         },
         {
-            color: rl.Blue,
+            color: rl.White,
             radius: magnetRadius,
             // force: magnetForce,
         },
@@ -111,6 +115,11 @@ func main() {
             radius: magnetRadius,
             // force: magnetForce,
         },
+        {
+            color: rl.Magenta,
+            radius: magnetRadius,
+            // force: magnetForce,
+        },
     }
 
     // posiciona imas em volta de um circulo